Roof-scaffold.



'n EL PARRIs. R0021 SOAFFOLD.

APPLIOATION FILED AUG. 16, 1910.

\ Patented Apr.4, 1911.

me/Mofa FRANK E. PRRIS, 0F URBANA, ILLINOIS.

ROOF-SCAFFOLD.

Specification of Letters Patent.

Patented Apr. 4, 1911.

Application filed August 16, 1910. Serial No. 577,422.

To all 'whom it may concern:

Be it known that I, FRANK E. PARRIS, a citizen of the United States of America, residing at Urbana, in the county of Champaign and State of Illinois, have invented new and useful Improvements in Roof- Scaffolds, of which the following is a specification.

This invention relates to roof scatfolds, and has for an object to provide a scaffold of this character which can be conveniently applied to the rootl and which when in a set up positionwill be of a rigid construction to effectively sustain the weight of the building materials and the laborer.

In the drawing, forming a portion of this specification and in which like numerals of reference indicate similar parts in the several viewsz-Figure 1 is a detail perspective view of a portion of a roof showing my improved scaifold applied thereto. Fig. 2 is a detail section therethrough taken on the line 2-2 of Fig. 1.

My improved scaffold comprises spaced parallel members 1 on which are mounted step-like brackets 2 with which the foot rail 8 is interchangeably associated. At the upper ends, each member has secured thereto a pair of suitably spaced plates 4 on which are formed depending hooks 5 to engage the apex of the roof as clearly shown in Fig. 2 of the drawing. The plates 4 are extended upwardly from the apex of the roof to form heads 6 with which the yoke-like attaching elements 7 of the members 8 are detachably engaged. The members 8 extend downwardly from the apex of the roof in opposite directions to the members 1 and as shown, each -of such members is provided with a step-like bracket 9. The members 8 are provided at their lower ends with spurlike anchoring feet 10. The members 1 are provided at their lower ends with similar spur-like anchoring feet 11. The feet 10 and 11 are designed to engage parts of the roof structure so as to hold my improved scalfold in its adjusted position. A shingle support 12 is provided at one end with a nail receptacle 13. The receptacle is formed on one of its longitudinal sides to provide a v combined guard and stop 14 against which the shingles can be piled. The support 12 is provided with spur-like anchoring feet 15 The members 1 and the foot rail 3 are designed to be used by the operator when applying the shingles. In building the flue, the diametrically opposite horizontally eX- tending beams 15 are employed. Each beam is provided on its underside and at its center with a keeper 16 which is designed to fit between the bracket plates f1 at the upper end of the member 1. Cotter pins or like detachable fasteningl devices extend through the heads 6 of the bracket plates and through the keepers 16. The beams 15 are provided near their ends with depend ing brackets 17 to which the members 18 of supporting feet are pivoted. The members 18 are provided with straps 19 in which the adjustable elements 20 are slidably mounted. The elements 20 and the members 18 of the feet are formed to provide alining passages through which cotter pins or like fastening devices 21 are detachably engaged. The elements 20 of the feet may be adjusted vertically and moved into engagement with the bracket-like members 2 and 9 respectively on the members 1 and 8 of the hereinbefore described structure. Vhen operatively applied to the roof the beams 15 extend horizontally across the apex and at opposite sides ofvthat point at which the flue is to be constructed. The adjustable feet on the beams 15 serve to hold the said beams perfectly rigid and in position to receive any well known form of detachable platform (not shown).

I claim In a roof scaffold, a pair of identically formed members extending downwardly at one side of the roof, a pair of spaced plates secured to the upper end ofy each member, the said plates being formed to provide lower hooked portions engaging the apex of the roof to hold the members in adjusted positions on the roof, the said plates having upper portions formed to provide heads, second members disposed on the opposite sido of the roof and provided with substantially yoke like members at their upper ends removably fitting over the headed p01'- tions of the said plates, the said headed portions of the said plates having alining apertures therein, beams extending across the apeX of the roof` at the point of connection named pairs of members so as to hold the 10 oi' the said lirst and second named pairs of beams against pivotal'movement.

members with each other and disposed im- In testimony whereof I aiiiX my signature mediately above the said 1foke like nembers in presence of two Witnesses.

to hold them against disp aeement rom the upper headed portions of the plates, attachi FRANK E' PARE-IS ing pins extending through the beams, and Vit-nesses:

means at the ends of the beams having en- J. Gr. OLDHAM,

gagement with the said rst and second AIDA PEARL OLDHAM.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents. Washington, D. C. 

